LISP Predictive Packet Replication for Cellular Handover Latency
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Solution Overview
Problem
Current IP networks experience latency and delay during handover operations due to triangular routing and packet buffering in LTE networks, as existing solutions treat mobility as unpredictable and random, leading to sub-optimal routing mechanisms.
Innovation Solution
Implementing a predictive routing feature in LISP that replicates packets to potential target base stations identified by the mobile device, allowing the target base station to buffer and deliver packets upon handover, eliminating the need for source base station buffering and forwarding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packets are buffered at the source base station and forwarded to the target base station during handover, then packet delivery is ensured, but latency and network traffic increase due to triangular routing
Solution Approach 1:
The patent applies preliminary action by predicting the target base station before handover occurs and pre-positioning packets at the target base station through replication. This eliminates the need for triangular routing and packet forwarding after handover, reducing latency while ensuring packet delivery. The system replicates packets to the predicted target base station in advance, so packets are already present when the mobile device switches connections.
2Reliability
If packets are replicated to multiple potential target base stations, then packet loss during handover is reduced, but network traffic increases
Solution Approach 1:
The patent applies partial action by replicating packets to only the most likely predicted target base station rather than all possible target base stations. This selective replication approach ensures session continuity for the anticipated handover while minimizing unnecessary network traffic to base stations that will not receive the mobile device.
3Speed
If predictive routing is implemented to reduce handover latency, then packet delivery speed improves, but device complexity increases
Solution Approach 1:
The patent uses the base station as an intermediary that performs the complex predictive routing and packet replication functions. The mobile device itself does not need to implement complex predictive routing logic; instead, the base station network handles the prediction and packet management, simplifying the device complexity while achieving fast packet delivery.
Data Source
AI summary
Disclosed herein are various embodiments designed to implement a handover operation of a user entity (UE) from a source base station to a target base station using a predictive routing feature in LISP or other ID protocols for packet replication to reduce latency in packet delivery to the user entity.